recently I installed OpenVPN to my WD MyBook Live. Basically it works very well, I can access the MyBook remotely via the tun/tap devices.
Next step should be to add a route to my private LAN. Sadly OpenVPN wont let me ping the pc's in my LAN.

My guess is, maybe there are some firewalling / iptables issues, but everytime I try to list or edit the iptables chains, the MyBook just throws me this exception:

Thanks for your reply, but even after adding the routes to my pc at home, pings in the vpn or from the vpn to the lan still result in timeouts. Thats where I believe maybe iptables or some firewall messes with my settings. Is there any way to check for active firewalls or scripts on the mybook?

To me it seems like iptables is installed but not compiled in the kernel - could this cause troubles?